The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 10, 1997
Filed:
Mar. 14, 1995
Ilkka Turunen, Oulu, FI;
Kemira Chemical OY, Helsinki, FI;
Abstract
The invention relates to a method for producing hydrogen peroxide by the anthraquinone process, by feeding into the top part of a fixed bed reactor (4) hydrogen (3) and a working solution (1), i.e. an anthraquinone derivative in an organic solvent, and by making these infed substances flow downwardly in the reactor, in order to catalytically hydrogenate the anthraquinone derivative owing to the influence of the catalyst bed (6) and by removing the hydrogenated working solution (9) from the reactor. According to the invention, there is used a fixed bed reactor provided with a stationary catalyst bed that has an open structure. The said working solution is fed into the top part of the reactor at a velocity so high that a separate gas space is not created at the top of the reactor, and that in the top part there is created a dense dispersion of the working solution and gas, and that in the reactor itself there is maintained a relatively high flow velocity, in order to make the said dense dispersion proceed deep down into the catalyst bed. The invention also relates to a fixed bed reactor used for realizing the process.